Method and device for operating a motor vehicle

Abstract

For the operation of a motor vehicle ( 2 ), when a critical (CRIT) operation state (STATE) of the motor vehicle ( 2 ) and/or a drive system ( 4 ) of the motor vehicle ( 2 ) is detected in which an operation error (ERROR) can occur, a driver of the motor vehicle ( 2 ) is signaled (SIG) that there is a critical (CRIT) operation state (STATE). When the operation error (ERROR) occurs, the system is switched into a limited operation (LIMIT) of the drive system ( 4 ).

1. A method of operating a motor vehicle, comprising the steps of:
 upon detection of a critical operating state of at least one of the motor vehicle and a drive system of the motor vehicle that may lead to an operating error:
 signaling the existence of the critical operating state to a driver of the motor vehicle, and 
 if the operating error occurs, performing a switchover to a limited operation of the drive system, 
 signaling the limited operation of the drive system, wherein said signaling is intensified during at least one of (a) a period from detection of the critical operating state to the switchover to limited operation and (b) a period from the switchover to limited operation to an overshooting or an undershooting of an operational limitation associated with the limited operation. 
 
 
     
     
       2. A method of operating a motor vehicle, comprising the steps of:
 upon occurrence of an operating error of at least one of the motor vehicle and a drive system of the motor vehicle:
 performing a switchover to a limited operation of the drive system defining at least one of an active limitation and a non-active limitation of the drive system, 
 signaling to a driver of the motor vehicle that the drive system is being operated in limited operation, wherein said signaling is intensified during at least one of (a) a period from detection of the critical operating state to the switchover to limited, operation and (b) a period from the switchover to limited operation to an overshooting or an undershooting of an operational limitation associated with the limited operation. 
 
 
     
     
       3. A method of operating a motor vehicle, comprising:
 upon detection of a critical operating state of at least one of the motor vehicle and a drive system of the motor vehicle that may lead to an operating error:
 signaling the existence of the critical operating state to a driver of the motor vehicle, and 
 if the operating error occurs, performing a switchover to a limited operation of the drive system, 
 wherein at least one of the detection of the critical operating state and the switchover to limited operation is signaled by a reaction of the drive system, said reaction comprising a variation of an actual position of an actuator about a defined actual position of the actuator. 
 
 
     
     
       4. The method according to  claim 3 , wherein the position of the actuator has an effect upon at least one of a torque generated by the drive system, a rotational speed of the drive system, and upon a velocity of the motor vehicle. 
     
     
       5. A method of operating a motor vehicle, comprising:
 upon detection of a critical operating state of at least one of the motor vehicle and a drive system of the motor vehicle that may lead to an operating error, signaling the existence of the critical operating state to a driver of the motor vehicle, and 
 upon the occurrence of the operating error, performing a switchover to a limited operation of the drive system, the limited operation defining an operational limitation of the drive system, and 
 signaling to the driver a manner in which an overshooting or an undershooting of the operational limitation of the drive system may be prevented. 
 
     
     
       6. A device for operating a motor vehicle, the device being programmed to:
 upon detection of a critical operating state of at least one of the motor vehicle and a drive system of the motor vehicle that may lead to an operating error:
 signal the existence of the critical operating state to a driver of the motor vehicle, and 
 if the operating error occurs, perform a switchover to a limited operation of the drive system, 
 signal the limited operation of the drive system, wherein said signaling is intensified during at least one of (a) a period from detection of the critical operating state to the switchover to limited operation and (b) a period from the switchover to limited operation to an overshooting or an undershooting of an operational limitation associated with the limited operation. 
 
 
     
     
       7. A device for operating a motor vehicle, the device being programmed to:
 upon occurrence of an operating error of at least one of the motor vehicle and a drive system of the motor vehicle:
 perform a switchover to a limited operation of the drive system, and 
 signal to a driver of the motor vehicle that the drive system is being operated in limited operation, wherein said signaling is intensified during at least one of (a) a period from detection of the critical operating state to the switchover to limited operation and (b) a period from the switchover to limited operation to an overshooting or an undershooting of an operational limitation associated with the limited operation. 
 
 
     
     
       8. A device for operating a motor vehicle, the device being programmed to:
 upon detection of a critical operating state of at least one of the motor vehicle and a drive system of the motor vehicle that may lead to an operating error:
 signal the existence of the critical operating state to a driver of the motor vehicle, and 
 if the operating error occurs, perform a switchover to a limited operation of the drive system, 
 wherein at least one of the detection of the critical operating state and the switchover to limited operation is signaled by a reaction of the drive system, said reaction comprising a variation of an actual position of an actuator about a defined actual position of the actuator. 
 
 
     
     
       9. A device for operating a motor vehicle, the device being programmed to:
 upon occurrence of an operating error of at least one of the motor vehicle and a drive system of the motor vehicle:
 perform a switchover to a limited operation of the drive system, and 
 signal to a driver of the motor vehicle that the drive system is being operated in limited operation, wherein at least one of the detection of the critical operating state and the switchover to limited operation is signaled by a reaction of the drive system, said reaction comprising a variation of an actual position of an actuator about a defined actual position of the actuator. 
 
 
     
     
       10. A method of operating a motor vehicle, comprising:
 upon occurrence of an operating error of at least one of the motor vehicle and a drive system of the motor vehicle:
 performing a switchover to a limited operation of the drive system defining at least one of an active limitation and a non-active limitation of the drive system, and 
 signaling to a driver of the motor vehicle that the drive system is being operated in limited operation, 
 wherein the switchover to limited operation is signaled by a reaction of the drive system, said reaction comprising a variation of an actual position of an actuator about a defined actual position of the actuator. 
 
 
     
     
       11. The method according to  claim 10 , wherein the position of the actuator has an effect upon at least one of a torque generated by the drive system, a rotational speed of the drive system, and upon a velocity of the motor vehicle. 
     
     
       12. A method of operating a motor vehicle, comprising:
 upon occurrence of an operating error of at least one of the motor vehicle and a drive system of the motor vehicle:
 performing a switchover to a limited operation of the drive system defining at least one of an active limitation and a non-active limitation of the drive system, 
 signaling to a driver of the motor vehicle that the drive system is being operated in limited operation, and 
 signaling to the driver a manner in which an overshooting or an undershooting of the operational limitation of the drive system may be prevented.